My cow ran away

In the mystical fantasy world, Chen Chang'an was confined to the forbidden library as soon as he arrived,
The sky literally started falling from the very beginning.
Fortunately, at that very moment, his system awakened,
All he needed to do was to read scriptures, and he would keep getting stronger.
Thus, with the library filled with various books, a smile appeared on Chen Chang'an's face.
........
[Ding! You've read Daoist Scriptures and gained a level in 'Heaven Opening Law', currently Level 6.]
[Ding! You've read the Secret Manuscript of Ten Thousand Buddhas, gained a level of Divine Skill 'Six Daos of Reincarnation', currently Level 8.]
[Ding! You've read the Secret Records of Demon Gate, gained a level of Divine Skill 'True Demon That Shakes The World', currently Level 7.]
....
[Ding! Due to the Laws of All Heavens being added to your body, embellished with trembling Literary Qi of the Great Dao, you're rewarded with: Become a Saint on the spot!] 
Years later, as time turned everything old, the world above and the world beneath were already in a desperate turmoil, with immortals descending to the mortal world, and gods and demons performed chaotic dances, making the lives of people unbearable.
Chen Chang'an stepped out of his seclusion one day, looking at the heavenly gods and buddhas scattered across the sky.
“I'm not targeting anyone in particular, but everyone here is garbage!”
That day, he swung his sword and parted the heavens, ever since then, Heaven belongs to Heaven, Earth belongs to Earth!
....!
[PS: Extreme mystical fantasy flow, invincible style! Light readers beware!] 

Become a Saint through Studying! Exposed by my little junior sister!

However, faced with the suspicion of Tian Ji, the Demon Lord, and his companions, Yuan Chu, the Demon Lord, reiterated the statement he had just made.


"Everyone, to achieve Heavenly Venerability, one must undergo the Heavenly Dao's Heaven and Earth Killing Tribulation."


"Emperor Song is indeed unrivaled, but even he, when facing the Heaven and Earth Killing Tribulation, will inevitably be severely wounded!"


"If we don't take action at this time, once he has recovered, we will never get a chance!"


At this point, Yuan Chu, the Demon Lord, spoke again in a deep voice:


"Emperor Song doesn't like trouble and is decisive in killing."


"If we don't seize this opportunity to capture him, do you think we still have a place in this world later on?"


Having heard the words of Yuan Chu, the Demon Lord, Tian Ji, the Demon Lord, and his companions fell silent.


Indeed, what Yuan Chu, the Demon Lord, said makes sense.


Chapter 158: The Heaven and Earth Change, Six Daos Born, Five Great Demon Lords Plot Human Tribulation!_2